Use Primer: The Essential Step Of Painting Concrete

Cement primer is a color that is applied to various surfaces before the topcoat is applied. Painting a primer will increase the adhesion between the surface and the topcoat. Makes the real color last long and doesn't peel off, giving beauty to the surface for a longer time. No need to wait for new paint to waste money. And can we paint the house right away? The answer is "absolutely not." There are two types of cement primer: new cement primer and old cement primer. Both types are suitable for different applications. So what type should we choose to meet the needs of walls and cement floors at home?

Getting to know new cement primer

Homes that have just been built, buildings that have additions and new plaster, and cement that has just been plastered and waiting to dry and has never been painted before, new cement primer will be the answer for these jobs. If the primer is not applied before the actual painting, when the technician has just finished plastering, the newly plastered floor or wall will release moisture, causing stains on the surface and resulting in problems with the applied paint. However, when going to buy a new cement primer. We should consider its main features:

Must help prevent alkalinity from new plaster: In the first period after plastering, the plaster will have a very high alkalinity. Using new cement primer is like blocking the alkalinity from touching the actual paint. Makes plaster walls and topcoat have good adhesion. Plus the topcoat looks beautiful and bright as well.
Helps reduce surface absorption: If you observe the cement wall, it has a lot of pores. If we actually paint, the pores on the cement surface will absorb that kind of paint first. That means if we put down the primer first. It's like reducing absorption. When it comes to the actual painting process. It will help save more paint.
Easy to apply topcoat Helps to mask surfaces well: cement surfaces that are usually grey. If we apply real paint, it will be quite difficult to apply. It may require a larger amount of actual paint and more effort. But using a primer which has a white texture to apply the foundation first. It will help the paint stick to the wall more easily than before.

Steps for painting new cement

Leave the cement to dry: Leave it for at least 1 month or more. This is considered an appropriate period of time. If painting on cement that is not completely dry Will encounter problems with humidity Makes the paint not stick to the wall or peel off faster.
Clean cement surfaces: especially dust, cement fragments, and remaining dirt. The cleaning method should be chosen to suit each type of dirt. For example, if there is mold or moss stuck after we leave the cement behind. Scrub and clean. Apply the product to eliminate mold. and leave it to dry But if there are cracks Use a putty product. Leave it to dry completely before applying the new cement primer.
Paint the new cement primer: This increases adhesion and prevents alkali formation. By painting the primer onto the surface of the cement 1-2 times, then leaving the primer to dry for about 2-4 hours, then applying the topcoat.
Topcoat: for new plaster or a newly built house We recommend that if using a new cement primer, which model? Use the same topcoat model, such as TOA Shield One, a new, alkaline-resistant cement primer. Choose the TOA Shield One topcoat color, etc.

Getting to know old cement primer

Old cement wall that needs painting over or an old cement surface that has been plastered for a long time Most of the time there will be dirt and grime on the surface. Therefore, old cement primers must be selected specifically for these surfaces. The old cement primer will coat over the marks on the old cement surface. Makes repainting even easier. to increase adhesion and does not fall off easily How to choose and buy old cement primer? It has properties that need to be considered no different from new cement primer. Which we have summarized in an easy to understand way as follows:

Improves adhesion: Old cement primer acts like glue. That is, when applied, it will help make the surface smoother. It also helps increase the adhesion between the surface and the actual paint.
Helps the topcoat be beautiful for a long time: when it has good adhesion and has a more smooth surface It will help the true color last longer. Importantly, it also greatly reduces the problem of peeling, blistering or fading paint.
Ending the stain problem: It's normal for cement walls to get damp. It also has to encounter various weather conditions, so the old cement primer must have properties to help prevent dirt stains such as mold stains and salt stains in order to maintain the beauty and durability of the surface.

Steps for painting old cement

Scrub off the deteriorated paint as much as possible: Use a trowel to scrape off the old house wall paint first. Or you can use a polishing machine or sandpaper to clean off the old film layer. When painting the topcoat, it will adhere well.
Clean thoroughly: After scrubbing off the deteriorated paint. Check to see if the surface has dust stains. Or cracks or not? If there are dust stains, use water to scrub and wash them all. If there is mold or algae, keep cleaning And apply a product to eliminate mold such as TOA 113 Microkill and leave it to dry. If there are cracks Fill with putty or use a ready-made product for filling with putty, such as TOA Acrylic Filler. Leave it to dry before applying the old cement primer.
Paint the old cement primer: This increases adhesion and prevents alkali formation. By painting the primer onto the surface of the cement 1-2 times, then leaving the primer to dry for about 2-4 hours, then applying the topcoat.
Start painting old walls: Paint with a roller or brush. and leave it to dry Then start applying the second round. Use a brush or roller to paint as desired. Then leave it to dry for about 3-6 hours for maximum efficiency. Importantly, the surface should be protected from water for at least 24 hours.

See an overview of the new cement primer color. and the old cement primer is gone. Hopefully this article will help you make the right choice for purchasing a cement primer. and answers the surface you are concerned about We would like to leave you with a little tidbit, namely the cement primer that we saw was white. Many people may think that So, can we just apply the foundation color? Let me tell you, it really shouldn't be! Because primer is not designed to face the weather conditions directly. and does not cover as well as topcoat Therefore, apply only the foundation but not the topcoat. There is a very high chance that it will cause color problems.

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